According to a complaint Samsung filed with the U.S. District Court for the District of Delaware on May 4, the South Korean company is seeking a permanent injunction that bars Renesas and its subsidiaries from making, selling and importing into the U.S. any product that Samsung claims violates two of its patents.

Samsung, the world’s largest maker of computer memory chips, is seeking an unspecified sum in damages, court documents show.

Tokyo-based Renesas, set up by Japanese electronics makers Hitachi Ltd. and Mitsubishi Electric Corp. in 2003, is one of the largest semiconductor companies in the world. A Renesas official in Tokyo said the company was prepared to argue its case in court.

In January, Renesas filed two separate suits against Samsung in the same court, documents show. Renesas alleged that Samsung violated its patents related to dynamic random access memory, or DRAM, causing the company to “suffer irreparable harm.” Both cases are still pending.

DRAM chips are widely used in personal computers and other electronics devices.